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81.
Pradeep K. BanerjeeT. Rolf Turner 《Omega》2012,40(5):533-540
We present a flexible and versatile model which addresses the problem of assigning optimal prices to assets whose value becomes zero after a fixed expiry date. (Such assets include the important example of seats on airline flights.) Our model is broad in scope, in particular encompassing the ability to deal with arrivals of customers in groups. It is highly adaptable and can be adjusted to deal with a very extensive set of circumstances.Our approach to the problem is based on elementary and intuitively appealing ideas. We model the arrival of customers (or groups of customers) according to an inhomogeneous Poisson process. We incorporate into the model time dependent price sensitivity (which may also be described as “time dependent elasticity of demand”). In this setting the solution to the asset pricing problem is achieved by setting up coupled systems of differential equations which are readily amenable to numerical solution via (for instance) a vectorised Runge-Kutta procedure. An attractive feature of our approach is that it unifies the treatment of discrete and continuous prices for the assets. 相似文献
82.
The strategy and innovation literatures argue that organizational competitiveness is contingent upon firms simultaneously pursuing both process and product innovations. A firm’s control system plays a fundamental role in this regard by managing, motivating, and coordinating employees’ behaviors for the development of its innovative capabilities. Research suggests that in order to develop successful innovation, management must use controls that align employees’ interests with those of the organization while simultaneously allowing employee autonomy to encourage creativity. These disparate functions lead to the control–autonomy dilemma. We argue that managers can address this dilemma by recognizing that the effect of controls on innovation outcomes depends, in part, on the controls’ enabling features and the type of commitment they inspire. Our findings show that employee development, which is the focus of input controls, has a direct effect on process innovation-related behaviors while specified goals, the emphasis of output controls, have a direct effect on product innovation-related behaviors. It is only through employees’ perceptions of managerial support that input controls increase product innovation-related behaviors and output controls increase process innovation-related behaviors. 相似文献
83.
Combining moral philosophy with sociological theory to build on themes introduced in Hall and Lamont’s Successful Societies (2009), the paper outlines a distinctive perspective. It holds that a necessary condition of successful societies is that decision-makers base their decisions on a high level of attentiveness (concern and comprehension) towards subjectively valued and morally legitimate forms of life. Late modern societies consist of a plurality of forms of life, each providing grounds for what Alasdair MacIntyre has called internal goods—valued and morally valuable practices. The status of such goods is examined, and distinctions are drawn between their manifest and latent, and transposable and situationally specific, characteristics. We integrate this refined idea of internal goods into a developed conception of habitus that is both morally informed and situationally embedded. The sociological approach of strong structuration theory (SST) is employed to demonstrate how this conception of habitus can guide the critique of decision-making that damages internal goods. We identify the most pervasive and invidious forms of damaging decision-making in contemporary societies as those involving excessive forms of instrumental reasoning. We argue that our developed conception of habitus, anchored in the collectively valued practices of specific worlds, can be a powerful focus for resistance. Accounts of scholarship in higher education and of the white working class in America illustrate the specificities of singular, particular, social worlds and illuminate critical challenges raised by the perspective we advocate. 相似文献
84.
John A. Turner 《Economic inquiry》1988,26(3):403-422
Men frequently do not provide pension survivors insurance for their wives. To analyze why, a demand-supply model of survivors insurance is presented. Using the Survey of Private Pension Benefit Amounts, Tobit estimates are calculated for a sample of married male pensioners. Social security reduces the survivors insurance provided through private pensions, partially foiling governmental attempts to reduce poverty among widows. The decline in inflation and the Supreme Court's unisex pension decisions have increased the selection of pension survivors insurance so that an increase could not necessarily be attributed to the passage of the Retirement Equity Act. 相似文献
85.
Physical disability and depression: a longitudinal analysis 总被引:7,自引:0,他引:7
86.
Bryan S. Turner 《The Sociological review》1990,38(1):1-18
In the sociology of science, the historical analysis of the rise of seventeenth-century experimental science has been dominated by the research of Robert Merton, who argued that Protestant asceticism paved the way for scientific world-views. Merton was criticized by L.S. Feuer who claimed that science was in fact the outcome of hedonism not asceticism. This article supports the Merton thesis on the basis of a note on the historical development of anatomical dissections with special reference to public dissections in Holland m the seventeenth century. The principal difficulty for both Merton and Feuer is that scientific medicine in pre-modern societies was not differentiated from either religion or law. The anatomy lesson was in fact a juridical and moral drama. 相似文献
87.
88.
ABSTRACTThis paper describes the processes involved in the design, delivery, and evolution of a mobile app.’ The initial app’ was funded by an institutional Teaching Award to update the delivery of Egan interviewing skills to social work students. The article charts the progress of development, beginning with the initial rationale for the app’ and its subsequent evolution into a Motivational Interviewing resource for social workers within a designated local authority. Arguing for the increasing importance of digital resources, within social work training and practice, the article draws from theories of digital pedagogy, as well as highlighting the work of some prominent figures within this emerging field. The article is written as a collaboration between the lead author and the app’ developers, who have contributed technical detail and emphasized the need for collaboration. Whilst the article touches briefly on the mechanics involved with app creation, its chief aim is to act as a guide to the practical, financial and relational aspects of development – in order that other social work practitioners and educators are inspired to progress their own ideas into innovative digital resources. To facilitate this, the article concludes with a practical list of suggestions for successful digital development. 相似文献
89.
Danny W. Turner 《The American statistician》2013,67(2)
A simple parametrized example is provided to illustrate the well-known fact that correlation near one in magnitude does not imply a relationship that is near perfect linearity. 相似文献
90.
Meta-analysis using multilevel models with an application to the study of class size effects 总被引:1,自引:0,他引:1
Harvey Goldstein Min Yang Rumana Omar Rebecca Turner & Simon Thompson 《Journal of the Royal Statistical Society. Series C, Applied statistics》2000,49(3):399-412
Meta-analysis is formulated as a special case of a multilevel (hierarchical data) model in which the highest level is that of the study and the lowest level that of an observation on an individual respondent. Studies can be combined within a single model where the responses occur at different levels of the data hierarchy and efficient estimates are obtained. An example is given from studies of class sizes and achievement in schools, where study data are available at the aggregate level in terms of overall mean values for classes of different sizes, and also at the student level. 相似文献